# OC Root 2nd 3rd 4th PC Gene/Definition OC.141000 Bacteria.936701 Proteobacteria.200723 Gammaproteobacteria.14976 gap.1874 gap:GAPWK_2005 3'-to-5' exoribonuclease RNase R; K12573 ribonuclease R [EC:3.1.-.-]